Update style.css

style.css

@@ -1,28 +1,696 @@
+/* Use Inter font */
+html { font-family: 'Inter', sans-serif; }
+@supports (font-variation-settings: normal) {
+    html { font-family: 'Inter var', sans-serif; }
+}
+
+/* --- Base Futuristic Theme --- */
 body {
-	padding: 2rem;
-	font-family: -apple-system, BlinkMacSystemFont, "Arial", sans-serif;
+    /* background-color: #0f172a; */ /* slate-900 - Old background */
+    background-color: #02040a; /* Deepest space blue/black */
+    background-image: radial-gradient(ellipse at center, 
+        #1a2035 0%,  /* Inner glow - dark indigo */
+        #0f172a 40%, /* Mid-tone slate/blue */
+        #02040a 75%  /* Fading to deep space */
+    );
+    background-attachment: fixed; /* Keeps the gradient fixed during scroll */
+    color: #cbd5e1; /* slate-300 */
+    overflow: hidden; /* Prevent body scroll, manage scrolling in sections */
+    min-height: 100vh; /* Ensure gradient covers full viewport height */
+}
+
+/* --- Layout Heights --- */
+:root {
+    --history-panel-expanded-height: 12rem; /* 192px */
+    --history-panel-collapsed-height: 0rem; /* Can be 0 or a small value for a visible collapsed bar */
+    --history-panel-toggle-button-height: 2.5rem; /* Height of the toggle button area */
+    --history-panel-current-height: var(--history-panel-collapsed-height); /* Initial state: collapsed */
+}
+
+#main-content { 
+    height: calc(100vh - var(--history-panel-current-height) - var(--history-panel-toggle-button-height));
+    overflow-y: auto;
+    width: 100%; 
+    margin-left: 0; 
+    transition: height 0.3s ease-in-out;
+}
+
+/* Hide scrollbar for specific elements */
+#history-panel::-webkit-scrollbar { display: none; } 
+#history-panel { -ms-overflow-style: none; scrollbar-width: none; }
+
+
+/* Custom scrollbar for main content */
+#main-content::-webkit-scrollbar { width: 8px; }
+#main-content::-webkit-scrollbar-track { background: rgba(51, 65, 85, 0.5); border-radius: 10px; }
+#main-content::-webkit-scrollbar-thumb { background: #475569; border-radius: 10px; }
+#main-content::-webkit-scrollbar-thumb:hover { background: #64748b; }
+
+/* History Panel Scrollbar */
+#history-panel::-webkit-scrollbar { height: 6px; background-color: rgba(30, 41, 59, 0.5); }
+#history-panel::-webkit-scrollbar-thumb { background-color: #475569; border-radius: 3px; }
+#history-panel::-webkit-scrollbar-thumb:hover { background-color: #64748b; }
+#history-panel { scrollbar-width: thin; scrollbar-color: #475569 rgba(30, 41, 59, 0.5); }
+
+/* Code output styling in config modal */
+#code-output-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    margin-bottom: 0.5rem; /* mb-2 */
+}
+#copy-code-button {
+    background-color: #334155; /* slate-700 */
+    color: #94a3b8; /* slate-400 */
+    padding: 0.25rem 0.75rem; /* py-1 px-3 */
+    font-size: 0.75rem; /* text-xs */
+    border-radius: 0.375rem; /* rounded-md */
+    transition: background-color 0.2s, color 0.2s;
+    line-height: 1; /* Ensure icon is vertically centered */
+}
+#copy-code-button:hover {
+    background-color: #475569; /* slate-600 */
+    color: #cbd5e1; /* slate-300 */
+}
+ #copy-code-button.copied {
+    background-color: #059669; /* emerald-600 */
+    color: white;
+}
+
+#export-code-button {
+    background-color: #334155; /* slate-700 */
+    color: #94a3b8; /* slate-400 */
+    padding: 0.25rem 0.75rem; /* py-1 px-3 */
+    font-size: 0.75rem; /* text-xs */
+    border-radius: 0.375rem; /* rounded-md */
+    transition: background-color 0.2s, color 0.2s, opacity 0.2s;
+    line-height: 1; /* Ensure icon is vertically centered */
+}
+#export-code-button:hover:not(:disabled) {
+    background-color: #475569; /* slate-600 */
+    color: #cbd5e1; /* slate-300 */
+}
+#export-code-button:disabled {
+    opacity: 0.5;
+    cursor: not-allowed;
+}
+
+#code-output-container { 
+    margin-top: 0.25rem; 
+    height: 300px; 
+    overflow-y: auto; 
+    background-color: #020617; 
+    border: 1px solid #334155; 
+    border-radius: 0.375rem; 
+    padding: 1rem; 
+    scrollbar-width: thin;
+    scrollbar-color: #475569 rgba(30, 41, 59, 0.5);
+}
+#code-output-container::-webkit-scrollbar {
+    width: 6px; display: block;
+}
+#code-output-container::-webkit-scrollbar-track {
+    background: rgba(51, 65, 85, 0.3); border-radius: 3px;
+}
+#code-output-container::-webkit-scrollbar-thumb {
+    background: #475569; border-radius: 3px;
+}
+#code-output-container::-webkit-scrollbar-thumb:hover {
+    background: #64748b;
+}
+
+#code-output { 
+    font-family: monospace;
+    color: #94a3b8; 
+    white-space: pre-wrap;
+    word-wrap: break-word;
+}
+#code-output code.language-html {
+    font-size: 9pt;
+    color: #e2e8f0; 
+}
+
+/* Preview frame styling */
+.preview-frame {
+    width: 100%; height: 100%; flex-grow: 1; border: none;
+    background-color: #ffffff; 
+}
+.preview-loader {
+    position: absolute; top: 0; left: 0; right: 0; bottom: 0;
+    background-color: rgba(15, 23, 42, 0.7); 
+    display: flex; align-items: center; justify-content: center; z-index: 10;
+}
+
+/* Spinner */
+.spinner {
+    width: 2rem; height: 2rem;
+    border: 4px solid rgba(71, 85, 105, 0.3); 
+    border-left-color: #22d3ee; /* cyan-400 */
+    border-radius: 50%; animation: spin 1s linear infinite;
+}
+@keyframes spin { to { transform: rotate(360deg); } }
+
+/* Refinement loading */
+#refinement-loading-indicator {
+    position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%);
+    background-color: rgba(15, 23, 42, 0.85); 
+    backdrop-filter: blur(5px); color: #e2e8f0; 
+    padding: 1rem 1.5rem; border-radius: 0.5rem; 
+    z-index: 1000; display: none; align-items: center; gap: 0.75rem;
+    border: 1px solid #334155; box-shadow: 0 0 20px rgba(34, 211, 238, 0.2);
+}
+#refinement-loading-indicator svg { color: #22d3ee; }
+
+/* Slider value */
+#interval-value, #num-variations-value { font-weight: 600; color: #22d3ee; }
+
+/* Config Button (replaces sidebar toggle) */
+#top-left-controls {
+    position: fixed; top: 1rem; left: 1rem; z-index: 60; 
+    display: flex;
+    gap: 0.5rem; /* Space between buttons */
+}
+
+#config-button, #new-button {
+    background-color: rgba(51, 65, 85, 0.7); 
+    backdrop-filter: blur(5px); border-radius: 9999px; padding: 0.5rem;
+    box-shadow: 0 2px 10px rgba(0,0,0,0.3); cursor: pointer;
+    border: 1px solid #475569; 
+    transition: background-color 0.2s, color 0.2s, box-shadow 0.2s;
+    display: flex; /* Center icon */
+    align-items: center;
+    justify-content: center;
+}
+#config-button:hover, #new-button:hover {
+    background-color: rgba(71, 85, 105, 0.8); 
+    box-shadow: 0 0 10px rgba(34, 211, 238, 0.2);
+}
+#config-button svg, #new-button svg {
+    width: 1.25rem; height: 1.25rem; color: #94a3b8; transition: color 0.2s;
+}
+#config-button:hover svg, #new-button:hover svg {
+    color: #22d3ee; 
 }
 
-h1 {
-	font-size: 16px;
-	margin-top: 0;
+
+/* Full Screen Overlay */
+#fullscreen-overlay {
+    position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
+    background-color: rgba(15, 23, 42, 0.95); 
+    backdrop-filter: blur(8px); z-index: 900; display: flex; flex-direction: column;
+    padding: 1rem; box-sizing: border-box; opacity: 0; visibility: hidden;
+    transition: opacity 0.3s ease-in-out, visibility 0.3s ease-in-out;
+}
+#fullscreen-overlay.visible { opacity: 1; visibility: visible; }
+#fullscreen-iframe {
+    flex-grow: 1; width: 100%; height: 100%; border: 1px solid #334155; 
+    border-radius: 0.5rem; background-color: white; 
+    margin-top: 3rem; /* Add space for top buttons */
+}
+#exit-fullscreen-btn {
+    position: absolute; top: 1.5rem; right: 1.5rem; z-index: 955; /* Above nav buttons */
+    background-color: #ef4444; color: white;
+}
+#exit-fullscreen-btn:hover { background-color: #dc2626; }
+
+/* Fullscreen History Navigation Buttons */
+#fullscreen-history-nav {
+    position: absolute;
+    top: 1.5rem;
+    left: 50%;
+    transform: translateX(-50%);
+    z-index: 950; /* Below exit button, above iframe */
+    display: none; /* Hidden by default */
+    gap: 1rem;
+}
+#fullscreen-history-nav.visible {
+     display: flex; /* Show when needed */
+}
+#fullscreen-history-nav button {
+    background-color: rgba(51, 65, 85, 0.8); /* slate-700/80 */
+    color: #cbd5e1; /* slate-300 */
+    border: 1px solid #64748b; /* slate-500 */
+    padding: 0.5rem 1rem; /* py-2 px-4 */
+    border-radius: 0.375rem; /* rounded-md */
+    font-size: 0.875rem; /* text-sm */
+    font-weight: 500;
+    transition: background-color 0.2s, border-color 0.2s, color 0.2s;
+    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
+}
+ #fullscreen-history-nav button:hover:not(:disabled) {
+    background-color: rgba(71, 85, 105, 0.9); /* slate-600/90 */
+    border-color: #94a3b8; /* slate-400 */
+    color: #fff;
 }
+ #fullscreen-history-nav button:disabled {
+    background-color: rgba(51, 65, 85, 0.5);
+    border-color: #475569; /* slate-600 */
+    color: #64748b; /* slate-500 */
+    cursor: not-allowed;
+    opacity: 0.6;
+}
+
+
+body.fullscreen-active #top-left-controls { opacity: 0; pointer-events: none; }
+body.fullscreen-active #main-content { overflow: hidden; }
+body.fullscreen-active #history-panel { display: none; } 
 
-p {
-	color: rgb(107, 114, 128);
-	font-size: 15px;
-	margin-bottom: 10px;
-	margin-top: 5px;
+
+/* Perspective Grid Styles (for 4 variations) */
+#perspective-viewport {
+    flex-grow: 1; min-height: 0; display: flex;
+    align-items: center; justify-content: center;
+    padding: 0.5rem; perspective: 1500px; overflow: hidden;
+}
+#preview-grid-wrapper { 
+    display: grid; 
+    width: 98%; max-width: 1200px; height: auto;
+    aspect-ratio: 16 / 10; 
+    transition: transform 0.5s ease-out;
+}
+#preview-grid-wrapper.grid-mode {
+    grid-template-columns: repeat(2, 1fr);
+    grid-template-rows: repeat(2, 1fr); gap: 1.5rem; 
+    transform-style: preserve-3d;
+    transform: rotateX(10deg) rotateY(0deg) scale(0.95);
+}
+ #preview-grid-wrapper.single-mode {
+    grid-template-columns: 1fr;
+    grid-template-rows: 1fr; gap: 0;
+    transform: none; 
+    width: 100%; height: 100%; max-width: none; aspect-ratio: unset;
 }
 
-.card {
-	max-width: 620px;
-	margin: 0 auto;
-	padding: 16px;
-	border: 1px solid lightgray;
-	border-radius: 16px;
+
+.preview-item-perspective { 
+    background-color: rgba(51, 65, 85, 0.6); 
+    backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
+    border-radius: 0.75rem; 
+    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3), 0 0 5px rgba(34, 211, 238, 0.1);
+    display: flex; flex-direction: column; overflow: hidden;
+    transform-style: preserve-3d;
+    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
+    border: 1px solid #475569; 
+}
+.preview-item-perspective:hover:not(.selected) {
+    transform: translateY(-8px) scale(1.03) translateZ(5px);
+    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.4), 0 0 15px rgba(34, 211, 238, 0.2);
+    border-color: #64748b; 
+}
+.preview-item-perspective.selected { 
+    border-color: #22d3ee; 
+    transform: scale(1.06) translateZ(20px); 
+    box-shadow: 0 15px 40px rgba(34, 211, 238, 0.3), 0 0 25px rgba(34, 211, 238, 0.4), inset 0 0 10px rgba(34, 211, 238, 0.2);
+    z-index: 5;
+}
+.preview-header {
+    padding: 0.6rem 1rem; border-bottom: 1px solid #475569; 
+    display: flex; justify-content: space-between; align-items: center;
+    flex-shrink: 0; background-color: rgba(71, 85, 105, 0.5);
+}
+.preview-header-title {
+    font-size: 0.9rem; font-weight: 600; color: #e2e8f0; 
+    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
+}
+.preview-header-buttons { display: flex; align-items: center; gap: 0.5rem; }
+.preview-header-buttons button, .preview-header-buttons .fullscreen-btn {
+    padding: 0.25rem 0.5rem; border-radius: 0.375rem; 
+    transition: background-color 0.2s, color 0.2s, box-shadow 0.2s;
+}
+.preview-header-buttons .fullscreen-btn { color: #94a3b8; }
+.preview-header-buttons .fullscreen-btn:hover:not(:disabled) {
+    color: #22d3ee; background-color: rgba(51, 65, 85, 0.7);
+}
+.preview-header-buttons .fullscreen-btn:disabled { color: #475569; cursor: not-allowed; }
+.preview-body {
+    position: relative; flex-grow: 1; min-height: 0;
+    display: flex; overflow: hidden; 
 }
 
-.card p:last-child {
-	margin-bottom: 0;
+.single-preview-item {
+    width: 100%; height: 100%;
+    background-color: rgba(30, 41, 59, 0.5); 
+    border: 1px solid #334155;
+    border-radius: 0.5rem;
+    display: flex; flex-direction: column; overflow: hidden;
 }
+
+
+/* Futuristic input/select styles */
+.futuristic-input, .futuristic-select {
+    background-color: rgba(30, 41, 59, 0.8); border: 1px solid #475569; 
+    color: #e2e8f0; border-radius: 0.375rem; 
+    box-shadow: inset 0 1px 2px rgba(0,0,0,0.2);
+    transition: border-color 0.2s, box-shadow 0.2s;
+    padding: 0.5rem 0.75rem; 
+}
+.futuristic-input::placeholder { color: #64748b; }
+.futuristic-input:focus, .futuristic-select:focus {
+    outline: none; border-color: #22d3ee; 
+    box-shadow: 0 0 0 2px rgba(34, 211, 238, 0.3), inset 0 1px 2px rgba(0,0,0,0.2);
+}
+.futuristic-select {
+     -webkit-appearance: none;
+     -moz-appearance: none;
+     appearance: none;
+     background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
+     background-repeat: no-repeat;
+     background-position: right 0.5rem center;
+     background-size: 1.2em 1.2em;
+     padding-right: 2.5rem; 
+}
+
+
+/* Futuristic button styles */
+.futuristic-button {
+    background-color: #0e7490; color: #f0f9ff; 
+    font-weight: 500; border-radius: 0.375rem; 
+    transition: background-color 0.2s, box-shadow 0.2s, transform 0.1s;
+    box-shadow: 0 2px 5px rgba(0,0,0,0.2), 0 0 0 0 rgba(34, 211, 238, 0.0);
+}
+.futuristic-button:hover:not(:disabled) {
+    background-color: #0891b2; 
+    box-shadow: 0 4px 8px rgba(0,0,0,0.3), 0 0 10px 2px rgba(34, 211, 238, 0.3);
+    transform: translateY(-1px);
+}
+.futuristic-button:active:not(:disabled) {
+    transform: translateY(0px);
+    box-shadow: 0 2px 5px rgba(0,0,0,0.2), 0 0 5px 1px rgba(34, 211, 238, 0.2);
+}
+.futuristic-button:disabled {
+    background-color: #334155; color: #64748b; 
+    cursor: not-allowed; opacity: 0.7;
+}
+.futuristic-button.selected-state { 
+     background-color: #059669; 
+}
+.futuristic-button.selected-state:hover:not(:disabled) {
+    background-color: #047857; 
+    box-shadow: 0 4px 8px rgba(0,0,0,0.3), 0 0 10px 2px rgba(16, 185, 129, 0.3);
+}
+
+
+/* Range slider styling */
+input[type="range"].futuristic-slider {
+    -webkit-appearance: none; appearance: none; width: 100%; height: 8px;
+    background: #334155; border-radius: 5px; outline: none;
+    opacity: 0.9; transition: opacity .2s;
+}
+input[type="range"].futuristic-slider:hover { opacity: 1; }
+input[type="range"].futuristic-slider::-webkit-slider-thumb {
+    -webkit-appearance: none; appearance: none; width: 18px; height: 18px;
+    background: #22d3ee; border-radius: 50%; cursor: pointer;
+    border: 2px solid #0f172a; box-shadow: 0 0 5px rgba(34, 211, 238, 0.5);
+}
+input[type="range"].futuristic-slider::-moz-range-thumb {
+    width: 18px; height: 18px; background: #22d3ee; 
+    border-radius: 50%; cursor: pointer; border: 2px solid #0f172a; 
+    box-shadow: 0 0 5px rgba(34, 211, 238, 0.5);
+}
+
+/* --- History Panel (Bottom) --- */
+#history-panel-controls {
+    height: var(--history-panel-toggle-button-height);
+    display: flex;
+    align-items: center;
+    justify-content: center; /* Center the group */
+    gap: 1rem; /* Space between nav arrows and toggle */
+    background-color: rgba(15, 23, 42, 0.9); /* Match history panel bg */
+    border-top: 1px solid #334155; /* Match history panel border */
+    position: relative; /* For potential absolute positioning of button if needed or pseudo-elements */
+    z-index: 51; /* Above history panel content, below modals */
+}
+
+#history-toggle-button {
+    background-color: rgba(51, 65, 85, 0.7); /* slate-700 with alpha */
+    border: 1px solid #475569; /* slate-600 */
+    border-radius: 9999px; /* pill shape */
+    padding: 0.375rem; /* py-1.5 px-1.5 (adjust based on icon size) */
+    cursor: pointer;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    color: #94a3b8; /* slate-400 for icon */
+    transition: background-color 0.2s, color 0.2s, box-shadow 0.2s;
+    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
+}
+
+#history-toggle-button:hover {
+    background-color: rgba(71, 85, 105, 0.8);
+    color: #cbd5e1; /* slate-300 */
+    box-shadow: 0 0 10px rgba(34, 211, 238, 0.2);
+}
+
+#history-toggle-button svg {
+    width: 1.25rem; /* w-5 */
+    height: 1.25rem; /* h-5 */
+}
+
+#history-panel {
+    position: fixed;
+    bottom: 0;
+    left: 0;
+    right: 0;
+    height: var(--history-panel-current-height); /* Use CSS variable */
+    background-color: rgba(15, 23, 42, 0.9); 
+    backdrop-filter: blur(10px);
+    -webkit-backdrop-filter: blur(10px);
+    /* border-top: 1px solid #334155; Removed as controls has it now */ 
+    padding: 1rem 2rem; /* Add more horizontal padding for fan effect */
+    z-index: 50; 
+    overflow-x: auto;
+    overflow-y: hidden;
+    display: flex;
+    align-items: center; 
+    /* gap: 1rem; Remove fixed gap, overlaps will be handled by transforms */
+    transition: height 0.3s ease-in-out, padding 0.3s ease-in-out, opacity 0.3s ease-in-out;
+    opacity: 1;
+    perspective: 1000px; /* Add perspective for 3D transforms */
+}
+
+#history-panel.history-collapsed {
+    /* height is controlled by --history-panel-current-height via JS */
+    padding-top: 0;
+    padding-bottom: 0;
+    opacity: 0;
+    overflow: hidden; /* Ensure content is clipped during collapse */
+}
+
+/* Hide thumbnails when panel is collapsed to prevent interaction/layout issues */
+#history-panel.history-collapsed .history-thumbnail-item,
+#history-panel.history-collapsed #history-panel-placeholder {
+    display: none;
+}
+
+.history-thumbnail-item {
+    position: relative; /* Keep for z-index */
+    flex-shrink: 0; 
+    width: 10rem; 
+    height: 7.5rem; 
+    background-color: rgba(51, 65, 85, 0.5); 
+    backdrop-filter: blur(8px);
+    -webkit-backdrop-filter: blur(8px);
+    border: 1px solid #475569; 
+    border-radius: 0.5rem; 
+    box-shadow: 0 6px 18px rgba(0,0,0,0.35), 
+                        inset 0 0 8px rgba(34, 211, 238, 0.15),
+                        0 0 2px rgba(34,211,238,0.1);
+    display: flex;
+    flex-direction: column;
+    overflow: hidden;
+    /* transform-style: preserve-3d; Remove this */
+    /* transform: perspective(600px) rotateY(-8deg) rotateX(3deg) translateZ(-15px); Remove static transform */
+    transition: transform 0.7s cubic-bezier(0.25, 0.8, 0.25, 1), 
+                        box-shadow 0.3s cubic-bezier(0.25, 0.8, 0.25, 1),
+                        border-color 0.3s ease,
+                        z-index 0.7s ease; /* Add z-index transition */
+    /* Add margin to handle potential overlap calculations if needed, maybe negative */
+    margin-left: -30px; /* Example: Pull items closer together */ 
+}
+
+/* Pull first item back to the left */
+.history-thumbnail-item:first-child {
+    margin-left: 0;
+}
+
+.history-thumbnail-item:hover {
+    /* transform: perspective(600px) rotateY(-3deg) rotateX(1deg) translateZ(0px) scale(1.08); */ /* Remove old hover transform */
+    transform: translateY(-15px) scale(1.15) rotate(0deg); /* Bring up, scale, and un-rotate on hover */
+    box-shadow: 0 15px 40px rgba(0,0,0,0.5), 
+                        inset 0 0 12px rgba(34, 211, 238, 0.25),
+                        0 0 15px rgba(34,211,238,0.4);
+    border-color: #22d3ee; 
+    z-index: 100; /* Ensure hovered item is on top */
+}
+.history-thumbnail-item.active-history-item {
+    border-color: #22d3ee; 
+    /* transform: perspective(600px) rotateY(-4deg) rotateX(2deg) translateZ(0px) scale(1.06); */ /* Remove old active transform */
+    box-shadow: 0 10px 30px rgba(34, 211, 238, 0.3), 
+                        inset 0 0 15px rgba(34, 211, 238, 0.3),
+                        0 0 10px rgba(34,211,238,0.4);
+    /* Active item might need slightly different base transform/z-index set by JS */
+    z-index: 50; /* Ensure active is above others but below hover */
+}
+.history-thumbnail-preview-container {
+    width: 100%;
+    height: calc(100% - 2rem); 
+    overflow: hidden;
+    position: relative;
+    border-bottom: 1px solid #334155;
+    cursor: pointer; 
+}
+.history-thumbnail-preview { 
+    width: 400%; 
+    height: 400%;
+    transform: scale(0.25); 
+    transform-origin: 0 0;
+    border: none;
+    pointer-events: none; 
+    background-color: #fff; 
+}
+.history-thumbnail-title {
+    font-size: 0.65rem; 
+    color: #cbd5e1; 
+    padding: 0.25rem 0.5rem; 
+    text-align: center;
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    line-height: 1.25rem; 
+    cursor: pointer; 
+}
+.history-thumbnail-fullscreen-btn {
+    position: absolute;
+    top: 0.25rem; 
+    right: 0.25rem; 
+    padding: 0.15rem; 
+    border-radius: 0.25rem; 
+    background-color: rgba(30, 41, 59, 0.6); 
+    color: #94a3b8; 
+    opacity: 0; 
+    transition: opacity 0.2s ease-in-out, background-color 0.2s, color 0.2s;
+    z-index: 15; 
+    cursor: pointer;
+}
+.history-thumbnail-item:hover .history-thumbnail-fullscreen-btn {
+    opacity: 1; 
+}
+.history-thumbnail-fullscreen-btn:hover {
+     background-color: rgba(51, 65, 85, 0.8); 
+     color: #e2e8f0; 
+}
+.history-thumbnail-fullscreen-btn svg {
+    width: 0.75rem; 
+    height: 0.75rem; 
+}
+
+#history-panel-placeholder {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    height: 100%;
+    width: 100%;
+    color: #64748b; 
+    font-size: 0.875rem; 
+}
+
+/* --- Modal Animation Effects --- */
+@keyframes fadeInDistort {
+    from {
+        opacity: 0;
+        transform: scale(0.9) skewY(3deg);
+    }
+    to {
+        opacity: 1;
+        transform: scale(1) skewY(0deg);
+    }
+}
+
+@keyframes fadeOutDistort {
+    from {
+        opacity: 1;
+        transform: scale(1) skewY(0deg);
+    }
+    to {
+        opacity: 0;
+        transform: scale(0.95) skewY(-2deg);
+    }
+}
+
+.modal-anim-fade-in {
+    animation: fadeInDistort 0.4s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
+}
+
+.modal-anim-fade-out {
+    animation: fadeOutDistort 0.3s cubic-bezier(0.75, 0.2, 0.75, 0.2) forwards;
+}
+
+
+/* --- Modals (Prompt & Config) --- */
+.modal-overlay { /* Common class for overlays */
+    position: fixed;
+    inset: 0; 
+    background-color: rgba(15, 23, 42, 0.8); 
+    backdrop-filter: blur(8px);
+    -webkit-backdrop-filter: blur(8px);
+    z-index: 1000; 
+    display: none; 
+    align-items: center;
+    justify-content: center;
+    padding: 2rem;
+    opacity: 0; /* Start transparent for animation */
+}
+.modal-overlay.visible {
+    display: flex;
+    opacity: 1;
+}
+.modal-content { /* Common class for content box */
+    background-color: #1e293b; 
+    padding: 1.5rem 2rem; 
+    border-radius: 0.75rem; 
+    border: 1px solid #334155; 
+    box-shadow: 0 10px 30px rgba(0,0,0,0.4);
+    width: 100%;
+    max-width: 42rem; 
+    display: flex;
+    flex-direction: column;
+    gap: 1rem; 
+}
+#modal-user-prompt { /* Specific to prompt modal */
+    min-height: 100px; 
+    resize: vertical; 
+}
+.modal-button-secondary {
+     background-color: #334155; 
+     color: #cbd5e1; 
+     border: 1px solid #475569; 
+}
+.modal-button-secondary:hover:not(:disabled) {
+     background-color: #475569; 
+     border-color: #64748b; 
+     color: #fff;
+}
+
+.history-nav-button {
+    background-color: transparent; /* Make nav buttons less prominent */
+    border: none;
+    border-radius: 9999px; 
+    padding: 0.375rem; 
+    cursor: pointer;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    color: #64748b; /* slate-500 for icon, less prominent */
+    transition: background-color 0.2s, color 0.2s, box-shadow 0.2s;
+}
+
+.history-nav-button:hover:not(:disabled) {
+    background-color: rgba(51, 65, 85, 0.7);
+    color: #94a3b8; /* slate-400 */
+}
+
+.history-nav-button:disabled {
+    color: #334155; /* slate-700 - very faded */
+    cursor: not-allowed;
+    opacity: 0.5;
+}